Source - Space Weather News for Feb. 19, 2012: http://spaceweather.com
AURORA SURPRISE: A solar wind stream hit Earth's magnetic field on Feb. 18th, sparking a surprisingly widespread display of auroras. Northern Lights crossed the Canadian border and descended as far south as Nebraska in the United States. Photographs of the display and speculation about what made the solar wind impact so potent are featured on today's edition of http://spaceweather.com
SPACE WEATHER ALERTS: Would you like a call when geomagnetic storms are in progress? Aurora alerts are available from http://spaceweathertext.com (text) and http://spaceweatherphone.com (voice).